air quality
A long while back, I came across some figures on air quality in different cities... I can't remember if it was around the world or specifically for the USA. Anyways, I have googled for a long while on this subject, and can't seem to get anything decent.
I am interested in how air quality (amounts of pollutants -- NOT natural things like pollen) ranks around the world. I live in Japan, so a study that has lots of Japan-specific info would be really nice.
I just want to compare where I am living now (Toyota) to where I used to live (Detroit) and then figure out where I WANT to live in the future. Air quality is a reasonably important factor as to where I choose to live.
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